Dumper is a Guardian GoBot. He can turn into a dump truck.
In the Challenge of the GoBots episode "It's The Thought That Counts" Cy-Kill, Cop-Tur, Crasher, Jeeper-Creeper, Pincher, and Snoop attack a lab, but it is defended by Leader-1, Professor von Joy, Blaster, Dozer, Dumper, Road Ranger, Scooter, Scratch and Turbo. Although the Guardians were winning the battle, an accidental backfire from Professor von Joy's weapon allows the Renegades to escape.
- GoBots Dumper (1983)